Kalek jambu is slang developed from the scientific name (Syzygium abatakam) of the tree known as kalek jambu in Minang. It means the state of being about to cum, as "abatakam" is similar to the slang word "ambatukam".
A jambloat is something that jams. Often used for programs that fail to compile, especially used when coding python. when a language is susceptibel to hidden bugs it is called jambloatable, such as c++.