The act of weaseling your way into a situation using the lowest means of sabotage possible. Examples include unnecessary guilt trips and the belittling of friends in order to accomplish selfish motives.
Adam steaseled his way into the girls bedroom by humiliating his friend.
The steasel Jordan pulled on me made it so that I could never have sex with that girl again.
Tom steaseled his way into a party he was not invited to, taking the place of a friend that would have been invited otherwise.