1dash 
/ˈdæʃ/ verb
dash·es; dashed; dash·ing /ˈdæʃ/ verb 1 [no obj] : to run or move quickly or suddenly
▪ I'm sorry, but I must dash. I'm late. ▪ She dashed down the hallway to the bathroom. ▪ People were dashing inside to get out of the rain. ▪ The dog dashed [=darted] across the busy street. — often + off ▪ She dashed off [=left suddenly and quickly] without finishing her breakfast. 2 always followed by an adverb or preposition a [no obj] : to hit something in a violent and forceful way
▪ The waves dashed [=smashed] against the rocks.
b [+ obj] : to break or destroy (something) by throwing or hitting it against something
▪ The waves dashed the boat against the rocks. ▪ In her anger, she dashed [=smashed] the plate to pieces on the floor. 3 [+ obj] : to destroy or ruin (something, such as a hope or an expectation)
▪ Her hopes of winning a medal were dashed after she broke her leg. ▪ our dashed expectations/dreams
▪ I'm sorry, but I must dash. I'm late. ▪ She dashed down the hallway to the bathroom. ▪ People were dashing inside to get out of the rain. ▪ The dog dashed [=darted] across the busy street. — often + off ▪ She dashed off [=left suddenly and quickly] without finishing her breakfast.
▪ The waves dashed [=smashed] against the rocks.
b [+ obj] : to break or destroy (something) by throwing or hitting it against something
▪ The waves dashed the boat against the rocks. ▪ In her anger, she dashed [=smashed] the plate to pieces on the floor.
▪ Her hopes of winning a medal were dashed after she broke her leg. ▪ our dashed expectations/dreams
dash it (all)
Brit, informal + old-fashioned — used in speech to express anger, frustration, etc. ▪ Dash it all! I've forgotten my keys!
dash off [phrasal verb]
dash off (something) or dash (something) off : to write (something) in a very quick and hurried way
▪ I have just enough time to dash off a letter. — see also 1dash 1 (above)
▪ I have just enough time to dash off a letter. — see also 1dash 1 (above)
