think up

come to think of it

By the way; now that I think about it; indicates something brought to mind.

give someone something to think about

To threaten or provide a challenge to.

have another think coming

To be deluded, to be mistaken; to need to rethink something one has determined; to need to reconsider one's plans or expectations.

lie back and think of England

Synonym of close one's eyes and think of England: to accept unwanted sex due to social pressures.

shut one's eyes and think of England

Alternative form of close one's eyes and think of England: to accept unwanted sex due to social pressures.

think aloud

To utter one's thoughts.

think back

To think about a time or experience; to recall.

think of England

Clipping of close one's eyes and think of England, and its variants.