A more advanced way of describing the actions of an air hump. First, you put your arms out flat infront of you, then you pull back as hard as you can whilst clenching your fists, at the same time as pushing your pelvis forward in a humping motion. Can be adapted in many ways e.g. in badminton, a player hits the shuttlecock with the racket through their legs. This motion looks as if the player is trying to hump the shuttlecock, therefore they have done a Greg McGrath.
Instead of being normal today, Kumar decided he would be a freak & do the Greg McGrath.
by ImNotGregMcGrath April 1, 2009
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Australia's most successful (and hot) fast bowler and is also currentely world #1. McGrath also known as Pigeon has been playing test cricket for over 10 years and has now claimed over 500 test scalps, he took his 500th scalp at Lords on the 21st of July 2004, he bowled Marcus Trescothik. He went on to win man of the match and took 5 wickets in the first innings and 4 in the second. His best test bowling figures are 8-24 which he took on in december v. pakistan. His top score in cricket is 61-which makes him the most successful number 11 batsmen.
Ohh Ahh Glenn McGrath!!!
by Queen Pigeon September 14, 2005
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little stupid nigger that thinks he is good at fortnite but sucks a lot of peen
I hate you Adam Mcgrath
by Hello Adam yor gay February 7, 2020
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The act of urinating out of your bedroom window in order to save time so you can return to playing video games as soon as possible.
"Where is Callum?"

"He's just having a Mcgrath special in his front lawn"
by bigdoin.ks November 28, 2017
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“A very smelly man who does not own a 49”4K120Hz Tv or a PS5
“Have you Heard of Cathal McGrath?”
“Oh yeah he’s that kid without a 49”4K120Hz Tv or PS5
by Jackamore15 October 6, 2021
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