Be like a spare prick at a wedding British vulgar slang
Used when one is not comfortable in or not suitable for a situation
I was like a spare prick at a wedding in my huge new school.
I won't go to Helen's party as I don't want to be like a spare prick at a wedding among her friends.
To look absolutely ridiculous and out of place
The verb "be" should be conjugated according to its tense.
Being perfectly suitable for one's interests or abilities
Jasmine really loves children, so being a kindergarten teacher would be right up her alley.