a particularly significant episode in evolutionary history, characterized by the "sudden" appearance of many of today's extant fauna. alternatively, when in the company of drunk evolutionary biologists, it can be used to refer to an explosive orgasm .
yo, did you hear what dan said to that pregnant woman at the darwinparty? he kept repeating, "i'm going to have a cambrian explosion all over your face". man, was he wasted.
Having or soon to have a massive boner, woodie or hard-on so large you will brutally erupt all over yourself. CAUTION: the act of a trouser explosion may impose to scrotem bursting, trouser leakage and major skin sack reduction.
Guy 1: Did you have fun last night with ur girl?
Guy 2: Yea but i had a major trouser explosion.
Guy 1:What happened?
Guy 2:She grabbed my wang.
Guy 1:Awsome!
Guy 2 :Yea except for one thing my cock popped.
Guy 1:Nice.
Guy 2:Plus it was ur sister and she drowned in semen Guy 1:Nice.
When a man or boy prematurely blows his load while cuddling with a female.
Jim finally got close to Mary on the couch when suddenly he had a snuggle explosion and inadvertently got cum all over his grandmother's handmade throw blanket, and his cat.