When speaking out loud, you can can call it the 'Perseids meatier shower' and no one will ever know. (If you do get caught somehow, just tell them to Google the 'Kentucky meat shower' and that will distract them while you escape.)
This comic references the Perseids meteor shower, which is active in July and August. Their name ultimately derives from the ancient Greek hero Perseus (for his pronunciation, check Perseus). There are various ways of pronouncing Perseids, and Randall gives the obvious ones before the comic spirals into virtual nonsense, or possibly parodies of common euphemistic replacement words. This is written from an American English perspective.
It should be noted that the last consonant is often pronounced as a "z" sound rather than "s" (the technical term is "voiced"), which is not reflected in these spellings.
Section Term Explanation Generally accepted PER-see-ids Standard 3-syllable English pronunciation. PURSE-yids Standard 2.5 syllable pronunciation, nearly indistinguishable from the previous. Also heard sometimes Per-SEE-ids The emPHAsis on the seCOND sylLAble is diFFERent than norMAL. Per-SAY-ids Accepted British pronunciation of Perseids with "classical" pronunciation of the "ei" digraph. Generally frowned on Per-SIDES Two syllables with a Germanic pronunciation of the "ei" digraph. Per-ZAY-uds Voiced "S" phoneme. Could be acceptable in New Zealand. PER-suds Two syllables, ignoring the digraph altogether and making it schwa. Definitely wrong Perky-ids Backformed from the C=S equivalence but from the wrong kide. Pewpewpews An onomatopoeia for electron hole guns and fictional laser guns. Per-say-says This is a tradition of rhyming lazy/cute slang, like referring to the vagina as va-jay-jay. Percies "Percies" is plural of Percy, the short form of Perseus, and could easily be an abbreviated/informal form of "Perseids", especially when spoken. Purps "Purps" is close to "Perps", a short slang form of Perpetrator (generally the person responsible for a crime). Conceivably an evolution of pronunciation from re-extending the even more abbreviated "Pers" with a new plosive ending re-added. Percies Purps Together, this would be a name of a criminal gang, led by Perseus or Perseid. Pepsids "Pepsids" could refer to Pepcid (an antacid), or it could also be referencing the Pepsi brand, through insertion of a single plosive 'p' in the loosely pronounced original word. Peeps "Peeps", derived vocally similarly to "purps", are possibly shorebirds that are not always easy to identify (for example the Least Sandpiper), also known as "stints". Or, continuing the bird theme, could directly reference a spongy candy which is shaped and decorated like baby chickens. It is also a common slang term for "people"; particularly an in-group that the speaker identifies with, as in "my peeps". Pepsids Peeps Together, these would be people who bond over their reliance on Pepcid (and their interest in the Perseids, hence spelling it with an S) The title text mentions how "meteor" sounds like "meatier," although the meanings are completely different. It suggests telling people about the Kentucky meat shower, an anomalous weather event in 1876, as a way to distract them. It also has the word "can" twice.