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Acronym for:
1. Shut the freakin' loser up.
2. Stir that fruity lemonade.
Greg: Man, I just ate a huge meatloaf my mom made.
Victoria: That must be so good.
Eli: Stfl, everyone hates meatloaf.
by gatewayuser May 19, 2009
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I love eating peanut butter. It gets stuck in my teeth, and I think, STFL.

Meeting leader: Next on the agenda is the water cooler is missing.
Meeting attender: And my fruit snacks were stolen from the fridge!
Meeting leader: Whoa whoa whoa, STFL! Let's try to stay on track here people.
by shimrock January 24, 2010
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