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under 60: a robot

60-80: a machine that makes your lawn crap on itself

80 and higher: a propelled machine that you guide across your lawn. it punctures holes about have inch around, and 2 inches deep, in the ground. this allows nutrience to seep deeper into your soil, loosens the dirt, and helps you grow more grass if you are reseeding your lawn
aerator rentals. $50 per hour.
by sushiman09 October 1, 2005
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Adj. Over-excited. Becoming obsolete, although still heard used by older generations. Often mispronounced as aeriated. Slightly British.
"He's too aerated over this-here girl, she ain't THAT good looking, surely!"
by Alex Quantashassle February 12, 2005
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âr'āt tr. vb., slang adopted by American SOF units, namely the Legendary Green Berets, for neutralizing a target by penetrating munitions, mainly hollow point or ball ammunition.
1) I aerated that cock-fag.

2) A while mag huh? That's some hefty aeration.
by ButtonsMedic August 10, 2010
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