Question

یه قلپ چای به انگلیسی

Answer 1

A sip of tea

https://www.goodreads.com/quotes/695673-the-first-sip-of-tea-is-joy-the-second-is

Comments

بهتر بود به جای قلپ ، جرعه می نوشتید. 

“The first sip [of tea] is joy, the second is gladness, the third is serenity, the fourth is madness, the fifth is ecstasy.”

 Jack Kerouac, The Dharma Bums

یک جرعه نوشیدن 

to take a sip

http://www.ldoceonline.com/dictionary/sip_2

Answer 2

Besides dear keramus nice answer :

gulp : a gulp of tea

http://goo.gl/dl6CFZ

swig : (take) a swig of tea

http://goo.gl/LszpmQ