teaseable

Example:He was used to jokes and was very unoffendable, never losing his cool during his client meetings.

Definition:Impervious to slight or insult; not easily angered or hurt by what other people say or do.

Example:The new manager was known for his unprovocable nature, remaining calm and collected even in the face of the most pointed criticism.

Definition:Not capable of being provoked or irritated by provocation.

Example:Despite the debate going on around him, Jack remained indifferent and did not react to the teasing or humor being exchanged.

Definition:Not caring one way or the other about something; not concerned or interested.