(idiomatic) To begin rapidly.

(Australia, slang) To become enraged.

plural of new kid on the block

(informal, idiomatic) Someone or something new to an existing community.

plural of block level element

(biology) A polyspermy block where the electric potential of an egg rapidly rises from -70mV to +20mV upon contact with sperm due to the influx of sodium ions.

Alternative form of chip off the old block

(nautical) A fiddle block.

(pathology) A heart condition in which the electrical impulses controlling the pace of the heart are not transmitted normally through either of the bundle branches.

Alternative form of chock full.