(you) mark my words!
used to tell someone that they should pay attention to what you are saying

[TahlilGaran] Dictionary of Contemporary English ▲

mark my words
give your attention to what I am saying because it is true and important.
That girl's going to cause trouble, you mark my words.

[TahlilGaran] English Idioms Dictionary ▲

mark my words.
(You) mark my words.
[old-fashioned]
something that you say when you tell someone about something that you are certain will happen in the future.
That girl's going to cause trouble, you mark my words.

[TahlilGaran] English Idioms Dictionary ▲

mark my words
remember what I'm telling you
"Mark my words, if you do not finish your homework project you are not going to go out this weekend."

[TahlilGaran] English Idioms Dictionary ▲