Hold on like bulldog and Tack on

Tack on and hold on like bulldog are semantically related. In some cases you can use "Tack on" instead a verb phrase "Hold on like bulldog".

Tack on verb - To join (something) to a mass, quantity, or number so as to bring about an overall increase.

Hold on like bulldog and tack on are semantically related. Sometimes you can use "Hold on like bulldog" instead a verb "Tack on".