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.
A genre of movies which prominently features battle, fight or war scenes (explosions) and attractive females (tits).
Hey Chad wanna come over and watch a couple splosiontits flicks? I've got Iron Man 2 and Transformers 2 on DVD. Pick up a 12 pack of Natty Ice on the way.