When a man goes to bed with a woman with the intention of having sex, but is too drunk to perform either to a decent standard or at all. If the woman allows the man another attempt in the morning to redeem himself, this is known as a mulligan.
Man I ended up sleeping with Jessica last night, but i was so trashed i just couldn't do it! It's ok though, all was not lost, I grabbed the mulligan
When you take a shit, then hours later your asshole starts to itch and you have to go wipe again.
Walter: "Yo man, you seem like something's bothering you."
Hank: "Yeah bro, I'm a little down in the dumps cuz my B-Hole itches so bad."
Walter: "Aww cheer up man, just go take a Mulligan."
Hank: "Word to your mother! I'll be right back!"