Noun: 1.) a person who has become infatuated with the idea of power 2.) someone who thinks they are above all others after being given a minor position of authority; those with swell head are unable to listen to the thoughts and ideas of their colleagues due to the pressure from the swelling inside their head. 3.) the penis that a person has been sucking in order to attain this position of power/authority.
Egomaniac work slut's brown nosing finally worked and now her swell head was out of control as the boss put her in charge of being in charge. We all wondered if he was concealing his swell head beneath his trousers after long meetings with work slut.
1) Someone who has a massive head
2) Someone who is very cocky and arrogant
1) "Look at the swell head on Barry"
2) "Siroos your a f**kin swell head"