When something you are using or own is stolen/taken when you are not looking. Comes from how animals, mostly birds of prey will swoop in and kill/pick up prey or take stuff that is lying around to eat and/or make a nest out of.
Person 1 "Where are those magazines I was reading before I went to the bathroom?"
Person 2 "They got swooped on by John a few minutes ago."
Abbreviation for touchdown in the game of American football. Scored when a player carrying the ball crosses into the end zone or catches a pass while in the end zone of the opposing team. Worth 6 points on the scoreboard.
"He threw 3 TD passes in first game of the season."
"They have already scored a TD on us."
"I can't believe I missed that pass, it would have been a TD for sure if I caught it."