l and f
L and F is a lunchtime romp with someone. It’s like a quickie, but during the day. It’s when you sneak off for a little fun and then go back to work.
"I had an L and F during lunch. Now I’m tired.", he was just lazy and had fun.
"She had an L and F with her coworker. Now she’s happy.", she was just flirty and had fun.
"He had an L and F with his boss. Now he’s embarrassed.", he was just stupid and had fun.