When something has been, or is 'mecked up' then it basically means 'f***ked up'.
It's a handy word for when you're around parents or teachers...or maybe even the queen if you're lucky.
Dennis: OMG..my dog just ate my homework...
Otis: haha...shame Miss Dicksy is gonna kill you.
Dorita: Yh, your ass is grass dood.
Dennis: This is SOO mecked up man. Wtf am i gonna do??
Otis: Don't ask me. I don't have a dog..
Dorita: Sme.
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."