Form (n.): A state or mood that a
person occasionally enters, typically characterized by annoying or irritating
behavior.
Easy to say to ones
face when they enter their form
"As
soon as the board game started, it was clear that (name) was in his form, selfishly making moves that benefited only him and sabotaged the
rest of us."
"When (name) gets into her form, she becomes overly competitive, turning a friendly game of trivia into a battleground."
"(Name) was in his form at the party, dominating the conversation and not letting anyone else get
a word in."