A high tempered Irishman who loses his cool multiple times a day and tends to blame others for his short comings. To make up for their small packages, a Seamus overcompensates by excessively calling everybody around him a simp and constantly checking himself out in the mirror. You can see a typical anger outburst while playing call of duty
Person 1 : Did he really just throw his game controller through the t.v.?

Person 2: yeah, he's really being a Seamus right now.
by Simp2 February 20, 2021
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Most commonly an irish name when translated to english means james .
James and Seamus (having the same meaning) mean: man with humongous purple cock with warts under the sack of balls.
1. Just got seamused last night so fucking hard!

2. Want to Seamus me? I’m in the mood
by Globnorp.on.instagram February 14, 2018
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An Irish guy who likes to wear girl's pants.
Guy: Who's that red-headed chick over there?
Other guy: Nah man, that's just Seamus.
by --bladhblahblah-- August 4, 2010
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A caring guy with a big heart. He's also hot and doesn't cheat on women.
Seamus is such a good person.
by Relgiroth July 8, 2020
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What a pushover and a snowflake. He finds memes from the prehistoric era funny. Can't speak french but needs to boost

his ego by saying he's a high level in DELF. Plays TF2. I saw his discord profile not so long ago playing Fortnite. What a dipshit.
Seamus can't play Minecraft without tickspeed 30.
by SATAN HAIL SATAN November 6, 2019
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Boy: “Wow look at that clown
Boy #2: “No that’s just Seamus”
by dtwd October 8, 2019
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