A so-called random wire antenna is an end fed antenna. One end goes straight into the rig, often with no feedline, and the other end in the air attached to something as high as you can find, as ...

His idea was to use the tape as the radiator for an end-fed halfwave, or EFHW, antenna, a multiband design that’s a popular option for hams operating from the 80-m band down to the 10-m band.

However, if you are interested in making a handy portable antenna, you might want to melt some plastic. [N2MXX] has an end fed antenna winder design that also contains the necessary matching toroid.