Means getting intensely excited on multiple facets. Either sexually excited or any form of intense excitement.
1. Sasha started stripping and Jim exclaimed Wowzers in my trousers!
2. Justine heard she got tickets to see Maroon 5 and the prospect of her seeing Adam Levine made her say Wowzers in my trousers!
1. When a man is so well endowed that when you see his penis your first response is wowzers.
2.When something occurs that is either shocking, exciting, not exciting, surprising regarding ones genital area.
After noticing my sexy ass friends huge bonerprotruding under his pants I couldn't help but say "wowzers in your trousers"!