[1] : WordNet (r) 2.0

ball up
     v : make a mess of, destroy or ruin; "i botched the dinner and
         we had to eat out"; "the pianist screwed up the difficult
         passage in the second movement" syn: botch, bumble,
         fumble, botch up, muff, blow, flub, screw up,
          spoil, muck up, bungle, fluff, bollix, bollix
         up, bollocks, bollocks up, bobble, mishandle, louse
         up, foul up, mess up, fuck up
see also:
botch bumble fumble botch up muff blow 
flub screw up spoil muck up bungle 
fluff bollix bollix up bollocks bollocks up 
bobble mishandle louse up foul up mess up 
fuck up 

[2] : Moby Thesaurus II by Grady Ward, 1.0

81 moby thesaurus words for "ball up":
   addle, addle the wits, becloud, bedazzle, befuddle, bewilder,
   bollix, bollix up, bother, bug, bugger, bugger up, cloud,
   complicate, confound, confuse, cook, daze, dazzle, discombobulate,
   discomfit, discompose, disconcert, disorganize, disorient,
   distract, disturb, embarrass, embrangle, entangle, flummox, flurry,
   fluster, flutter, fog, foul up, fuddle, fumble, fuss, garble,
   gum up, hash up, implicate, involve, jumble, knot, louse up, maze,
   mess up, mist, mix up, moider, muck up, muddle, perplex, perturb,
   pi, play hell with, play hob with, pother, put out, queer,
   raise hell, ramify, rattle, ravel, riffle, ruffle, scramble,
   screw up, shuffle, sink, snafu, snarl, snarl up, tangle,
   throw into confusion, throw off, tumble, unsettle, upset

Ball >> B Words
Ball, definition of term: Ball
ball_pag1.html

Ball Bearing >> B Words
Ball Bearing, definition of term: Ball Bearing
ball+bearing_pag1.html

Ball Bearings >> B Words
Ball Bearings, definition of term: Ball Bearings
ball+bearings_pag1.html

Backed Up >> B Words
Backed Up, definition of term: Backed Up
backed+up_pag1.html

Back Up >> B Words
Back Up, definition of term: Back Up
back+up_pag1.html

Ante Up >> A Words
Ante Up, definition of term: Ante Up
ante+up_pag1.html

Australian Ball >> A Words
Australian Ball, definition of term: Australian Ball
australian+ball_pag1.html

Act Up >> A Words
Act Up, definition of term: Act Up
act+up_pag1.html