What is Old Underwear?
1.
Sleeping with someone you've slept with many times in the past. They are comfy and familiar and easy to slip into.
"I ran into Steve at the bar last weekend and I slipped right into that old underwear, but I haven't called him since."
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When playing online Halo, if you get two kills within 4 seconds its called a double kill, but when playing with friends who don't p..