Easily found by using "Search", but for whatever reason I guess I feel like helping you out...
Blast and cruise refers to using high doses 4 usually a short length of time 6 or 8 weeks maybe.... At say 2g or 3g or 4g total per week. Usually with heavier, harsher drugs such as Trenbolone and Anadrol and the like, depending on your experience with anabolics, of course.
"Blast" is like a short period where you'd use heavier doses of stronger drugs than you'd normally use, to put on as much size as possible in that period.
"Cruise" is where youre still using anabolics, just add a smaller dose to maintain the muscle you put on during the blast., or are you even put on new muscle, despite the lower dosages. The doses in a cruise are still higher than what an HRT dose may be.... say if you blasted at three or four grams for a week, you would still crew at 1 gram per week. Say 700mg test (1ml of your 350mg/cyp 2x a week) and 300mg npp (say, just 2 inj's of your 150mg/ml npp, ideally, on days you do not inject your test. However to make things easier, (it is a cruise after all), you could do your NPP injection along with your cypionate injection, 2nd total 2x a week.