tack something ↔ on phrasal verb (see also tack)
to add something new to something that is already complete, especially in a way that looks wrong or spoils the original thing:
a beautiful old house with a hideous modern extension tacked on at the back

[TahlilGaran] Dictionary of Contemporary English ▲

tack on
tack on (something)
to add something that is extra or does not belong.
When we got the bill there was an extra 18% tacked on as a service charge.

You should ask that question at the meeting and not tack it on to an e-mail.

[TahlilGaran] English Idioms Dictionary ▲

tack on something
tack on (something)
to add something that is extra or does not belong.
When we got the bill there was an extra 18% tacked on as a service charge.

You should ask that question at the meeting and not tack it on to an e-mail.

[TahlilGaran] English Idioms Dictionary ▲

tack on
v. phr. To append; add.
We were about to sign the contract when we discovered that the lawyer had tacked on a codicil that was not acceptable to us.

[TahlilGaran] English Idioms Dictionary ▲