The Garrison Wood's definitions

I'll be in my bunk.

When something is sexual in nature, you say this. Similar to "That's what she said" or "bow chica bow wow."
Jayne Cobb says this after he saw Firefly's Companion and her female client.

Guy 1: Man that girl is hot.
Guy 2: I'll be in my bunk.

by The Garrison Wood February 10, 2012