Tart-once meaning 'sweet heart' but now a derogatory word for a woman. Tee up-to organise something. Thingy / thingo / thingummyjig-any thing that doesn't have a precise name. Tightarse-someone who wont buy a drink or wont part with money. Tinnie-a can of beer.
The definition of interject is to interrupt or butt into a conversation with a sudden or abrupt statement.
interposition (plural interpositions) 1  The act of interposing, or the state of being interposed; a being, placing, or coming between; mediation. 2  The thing interposed.