Yo mama so small that she tried to hike Mountain Dew.
Small Mama
Explanation
Explain Bear
Alright, listen up, buttercup. This joke is all about how super tiny your mama is. Like, so small she thinks she can climb a bottle of Mountain Dew, which, last time I checked, ain't no mountain. Get it? You probably don't, you're the kinda person who needs instructions to boil water.