Something that is really great, brilliant, sterling.
Wow that waistcoat is really topside.
by evenstarx October 18, 2018
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The Act Of Landing a Left/Right Hook straight onto the side of someone's head, when done effectively knocking onto their ass. (Top/Head, Side/Hook).
'If this prick keeps pissin me off then he's gettin a straight topside slap'

Jack - 'There was this right prick in the club last night'

Jon - 'Oh Yeah what did you do about it?'

Jack - 'Oh you know me, Just gave him a topside, that shut him up'

'Dont Watch That You'll Get a Topside' - Dizzee Rascal
by Nicky_Blue_Eyes August 20, 2010
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Being on the topside of a boat or ship.
“Hey Dave! You should come out. We’ve been topsiding all day and it’s beautiful!”
by xmeekx December 17, 2013
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"Say what you want man... you can't bring me down. I'm just chillin here, topsiding."
by GiantMike14 February 9, 2014
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One of the many ratings on an aircraft carrier other than that of a nuke. They usually complain about how nukes are spoiled overpaid bitches, even though the nukes are the ones that work far more hours, stand duty more often and are usually undermanned.
Nuke to Nuke:
We just stole a bunch of lightbulbs from a topside space.

Those dumb fuckin topsiders

Only topsiders get the day off today
by Hardworkinnuke September 13, 2008
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Taking a shit in the upper bowl of someone's toilet, such that the shit is not moved to the sewer when the toilet is flushed. The result is rotting shit in the top bowl of the toilet.
I topsided Dave when I was over at his house last night.
by eMeS September 11, 2004
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A personality trait that demonstrates strong decision-making skills or control, characteristic of homosexual males who prefer to be on top. Often valued by men who want to relax and not make choices (see, e.g. bottomy).
Where do you want to eat tonight?" "I'm not feeling like making decisions tonight. Just show me your topside and pick.
by @J_Cyrious July 13, 2011
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