spurt

Concise Oxford English Dictionary © 2008 Oxford University Press:
spurt/spɜːt/

▶verb

• 1 gush or cause to gush out in a sudden stream.

• 2 move with a sudden burst of speed.

▶noun

• 1 a sudden gushing stream.

• 2 a sudden burst of activity or speed.

– origin C16: of unknown origin.